poole



A. F. POOLE CALCULATING MACHINE.

APPLICATION FILED JAN-5.1918.

1,318,587. Patented 001. 14,1919.

2 SHEETS-SHEET I.

A. F. PGOLE.

CALCULATING MAQHINE. APPLICATION FILED [AN-5.1918.

Patented Oct. 14, 1919.

iSHEETS-SHEET 2 UNITED STATES PATENT OFFICE.

ARTHUR F. PObLE, F KENTILWORTH, ILL INOIS, ASSIGNOB, TO THE WAHLCOMPANY, OF WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE.

CALCULATINGMACHINE.

Specification of Letters Patent.

Patented Oct. 14, 1919.

Application filed January 5, 1918. Serial No. 210,501.

citizen of the United States, residing at Kenilworth, in the county ofCook and State 'of Illinois, have invented certain new and usefulImprovements in C'alculatlng Machines, of which the following is aspecification.

My invention is an improved calculating machine for the purpose ofcomputing and checking a particular kind of account hereinafter to bemore fully described.

The object of my invention is to provide improved means of handling saidforms of accounts, to the end that errors may be more readilycorrected'and the accounts may be computed with less labor than it ispossible to compute the same on calculatingmachines of the prior art.

The particular class of accountswhich my machine is adapted to computeare accounts which are written as in the example below:

It will be noted that this account consists of a series of items writtenin a. vertical col umn, and that the total of said items is writtenbeneath the column...

One of the objects of my improved machine is to obtain the grand totalof a series of accounts written in this manner and also to provide acheck in the way of accumulating a duplicate grand total to compare withthe grand tot-a1 obtained by the accumulation of the totals of theprimary account.

The above and other objects of my invention will be apparent to thoseskilled'in the art from a reading of the accompanying specification.

My invention may be best understood by reference to the accompanyingfigures, of which v Figure '1 is a front elevation of a machinelxequipped with my invention;

Fig. 2 is a perspective view of the arrange ment of the vertical andhorizontal totalizers, and

Fig. 3 is a development of the numeral Wheels of the two crosstotalizers employed.

Similar numerals of reference refer to like parts throughout the variousfigures.

In its preferred form my invention is used in connection with thewell-known lVahl crossfooting machine which has been extensively placedon the market and the mechanism of which is thoroughly described in thepatent of John C. Wahl, Patent No. 1,270, 17 1, filed March 15, 1916,said machineconsisting of a jumping or cross totalizer adapted to bebrought into cotiperation with any one of a series of verticaltotalizers, both totalizers being mounted on a typewriter and operatedby the typewriter numeral keys.

However, the VVahl machine described in said application is modified inseveral particulars, as will be hereinafter set forth.

Referring particularly to Figs. 1 and 2, 10 represents the typewriterequipped with a Wahl crossfooting attachment 11, said attachmentincluding a vertical actuator 12 and a cross actuator 13. The typewriteris equipped with the usual assemblage of letter and numeral keys.However, I have not shown the letter keys, since these would simplycomplicate the drawings. The type- Writer is also provided with a set oftabulator keys 35. Said keys being the customary tabulator keys presentin the Remington machine, it is not necessary to herein describe thestructure.

The vertical actuator is provided with a vertical master wheel 14, andthe cross actuator is provided with the cross master wheel 15. A set ofdigit keys 16 is provided and each of these keys is connected by a pullrod 17 to the actuator 11 by mechanism thoroughly described in said Wahlapplication and which it is not necessary to describe in thisspecification. Vertical depression of any of the digit keys 16 resultsin a differential rotation of the master Wheels 14 and 15 a number ofspaces determined by the particular digit key 16 which is beingoperated; for instance, if the 2 digit key is operated, the masterwheels 14 and 15 will turn two spaces, etc. The direction of rotation ofthe vertical master wheel 14 is controlled by a handle 18, this handlebeing manually settable in any one of three positions determining thatthe vertical master wheel shall revolve in a direction to add, revolvein a direction to subtract or not re lve t all, this latter conditioncorresponding to a disconnect or nonoperatingjc'oii dition ofthevertical masmaster wheel 15.

' to manual shift handle 23.

The Wahl machine is also provided with automatic means for determiningthe direction of rotation of the cross master wheel 15,

said means including a roller 20 mounted on the end of a crank arm 21,which is rotatably mounted on a shaft 22 in the vertical actuator. Theroller 20 is adapted to be acted on by cams (not shown) attached to thevertical totalizer. Whether or not the roller 20 or the handle 19 iseffective in determining the condition of the cross master wheel 15 isdetermined by the position of an automatic Said handle when in oneposition determines that the roller 20 shall be effective in controllingthe cross master wheel 15, and when in its alternative positiondetermines that the handle 19 shall be efiective to a like end.

The Wahl machine is also provided with a universal correcting handle 42,which, when operated, serves to reverse the condition of both thevertical master wheel 14 and the cross master wheel 15. This handle isused for the double purpose of first correcting an error by re-insertinga number in an oppo site direction, and second for extracting a total,the handle bein thrown to its alternative position, thereby throwing themachine into subtraction and the total exhibited on either the verticalor cross totalizers may be subtracted out. a i

The mechanism by which these handles and the roller 20 control the crossand vertical master wheels has been thoroughly, described in the citedapplication of Wahl and therefore need not be recited here.

My improved calculating machine is provided with a vertical totalizer 24and two cross totalizers 25 and 26. The vertical totalizer is mounted ona truck 27, said truck being attached to-the' typewriter carriage 28 bysuitable connections disclosed in the cited patent to Wahl. Thetypewriter carriage 28 advances step by step upon the depres' sion ofthe numeral keys 16 and numbers are inserted into the totalizersseriatz'm, the carriage 28 escaping to the left one step after theoperation of each of the digit keys 16.

The cross totalizers 25 and 26 are mounted on a cross truck 29, saidtruck being slidably mounted in the framework of the machine and havingmounted thereon a pickup latch 30, which is adapted to be connected to aheel 31 on the vertical totalizer, thus temporarily advancing the crosstruck 29 in synchronism with the main truck 27. The cross truck 29 isdrawn to the right by means of a spring 32, and a cam 33 is provided onthe framework of the machine and serves to release the latch 30 when apin 34. 1n said latch contacts with the cam 33 during the narytypewriter keys 35, so that the vertical master wheel 14 is inengagement with the talizer 24. The 5-key is then depressed, thusinserting the 5 into the vertical totalizer and also 5 in the tens laceof the cross totalizer 26. The 4 digit ey 16 is then depressed, thusinserting 4 into the units place of the vertical totalizer 24 and thecross totalizer 26. The carriage then escapes to the subunits place.However, the cross truck 29 still remains connected to the verticaltruck 27 for the reason that the pin 34 has not yet been acted on by thecam 33. On the next step of the vertical truck 27 contact is madebetween the. pin 34 and the cam The pickup latch 30 is disengaged fromthe heel 31 and the spring 32 pulls the cross truck 29 to the left untilit is stopped by mechanism hereinafter to be described.

The pickup and release mechanism just described is similar to that shownin the cited pate t of Wahl, to which the reader is referl' d forfurther information, the difference being that in said Wahl case thecross truck is released when the vertical truck has reached the subunitsdecimal place. In my present invention this release, for reasonshereinafter to be described, does not occur until the vertical truck hasstep farther.

he vertical totalizer 24 has mounted'on it a series of tie rods 36, 37,38 and 39, which serve to su port a plate 40 at a distance from wheel inthe tens order of the vertical toprogressed one i Y the verticatotalizer 24 equal to the distance between the cross totalizers 25 and26. The plate 40 is provided with a heel 41, which has a functionsimilar to the heel 31 on the vertical totalizer 24, and when the pickuplatch 30 is disconnected from the heel 31, the

cross truck moves to the right until the provided with its numeralwheels running in the reverse direction, as shown in Fig. 3. The purposeof said reverse numeral wheels will be hereinafter fully described.

Having now described the mechanism employed in carrying out myinvention, I shall describe its operation.

Assume that a series of bills, like the one given in the beginnin ofthis specification,

are to be computed. he first bill to be written is as follows:

bers above mentioned. After having written the last number 9.35, thevertical totalizer 24 will exhibit the total 22.30, as will also thecross totalizer 26. After having written the last digit of the number9.35, the space bar (not shown) of the typewriter is operated, therebypermitting the vertical truck 27 to escape one step to the left of thesubunits place. This step will disconnect the cross truck 29 from thevertical truck 27, and said cross truck will move to the right untilstopped by the engagement of the ickup latch 30 with the heel 41. Thevertical truck is now returned to the right and it is to be noted thatthe cross master wheel 15 will now be in coiiperation with the crosstotalizer 25, when the vertical master wheel 14 coiiperates with thevertical totalizer 24. The universal correcting lever 42 is then placedin its alternative position, thereby causing both the cross master wheel15 and the vertical master Wheel 14 to operate in subtraction. The total22.30 appearing in thevertical totalizer 24 is now printed out, andsince the number wheels of the cross totalizer 25 have their numbersarranged in a reverse direction, the printing out of the total in thevertical totalizer 24 will enter said total into the cross totalizer 25,which will accordingly show 22.30. Said total will agree with the totalshown in the cross totalizer 26, thus affording a check on thecomputation as so far made. And it is to be recollected that afterwriting the first bill we have the vertical totalizer 24 clear, ready tocompute the second bill, and the grand total of the bills computedexhibited in both the cross totalizers 25 and 26, the

correspondence of said exhibited totals affording a check upon the workthus far performed. 7

7 Now, assume that a second bill, as below, has to be written. 7 65 Theoperation is as before, except that the vertical totalizer 24 willexhibit the total 21.76, and the cross totalizer 26 will exhibit thetotal 44.06, this being the sum of the total of the first bill,22.30,"and the total of the second bill, 21.76. The total, 21.76,appearing in the vertical totalizer 24 is then subtracted out and thisact, as hereinbefore described, will add said total to the total alreadyappearing in the cross totalizer 25, which will then exhibit the total44.06, corresponding to the same total in the cross totalizer 26. Otherbills may be written in a similar manner and at the end of a days run,either the cross totalizer 25 or the cross totalizer 26 will give agrand total of the bills written during the day and the correspondenceof the totals exhibited by the cross totalizers 25 and 26 will be acheck upon the accuracy of the work performedr' While I have describedmy invention in its preferred form and also have shown it as operated inconnection with the Wahl crossfooting machine, I do not desire that theuse of my invention be so limited. It will be found useful in otherforms of accounts than the examples herein given and it will also befound useful when used in connection with machines other than theprecise structure herein disclosed.

Many variations may be made from the precise structure herein disclosedwithout departing from the spirit of my invention, since I" claim:

1. In a calculating machine, the combination of a totalizer toaccumulate sub-totals, a second totalizer to accumulate grand totals,said second totalizer being adapted to be brought into coiiperation withsaid first totalizer during the accumulation of said sub-totals, andmeans for clearing said sub-totals from said first totalizer andsimultaneously entering them into a third totalizer, said thirdtotalizer being provided with wheels numbered in the reverse directionfrom the arrangement of the numbers on said second totalizer.

2. In a calculating machine, the combination of a jumping decimalcarriage, two totalizers within the Zone of action of said jumpingdecimal carriage, means to bring said jumping decimal carriage intocoiiperation with either of said totalizers at will, a second decimalcarriage controlling the operation of said first decimal carriage, saidsecond decimal carriage having connecting stops placed thereon adistance apart equal to the distance between said two totalizers, athird totalizer, and means to enter a number simultaneously into saidfirst and third totalizers or into said second and third totalizers atwill.

3. In a calculating machine, the combination of a jumping decimalcarriage, two totalizers'within the zone of action of said jumpingdecimal carriage, said totalize'rs having their parts arranged toprogress in reverse directions, means to bring said jumping decimalcarriage into cooperation with either of said totalizers at will, asecond decimal carriagecontrolling the operation of said first decimalcarriage, said second decimal carriage having connecting stops placedthereon a distance apart equal to the distance between said twototalizers, a third totalizer, and means to enter a numbersimultaneously into said first and third copiel of this patent may beobtained for five cents each, by addressing the totalizers or into saidsecond and third totalizers at will.

4. The method of calculating a series of bills whose items and totalsare written in vertical alinement, which method consists in providing asingle totalizer for the computation of the various bills, a secondtotalizer for the computation of the grand totals of said items, and athird tc-talizer with its number wheels arranged in a reverse directionfor accumulating the grand totals of the totals of said bills andWriting said bills in the following manner: first accumulating the itemsof said bills in the first and second totalizers and then subtractingthe total of said bills from the first totalizer and simultaneouslyaccumulating said totals in the third totalizer without extracting saidtotal from said second totalizer.

In witness whereof I have hereunto subscribed my name.

ARTHUR F. POOLE.

(Zommiuioner of htentl,

Washington, D. 0.

